package com.rigi.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.rigi.common.BaseContext;
import com.rigi.common.CustomException;
import com.rigi.entity.*;
import com.rigi.mapper.OrderMapper;
import com.rigi.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     *
     * @param orders
     */
    @Override
    @Transactional//事务控制
    public void submit(Orders orders) {
        //获得当前用户id
        Long userId = BaseContext.getCurrentId();

        //查询当前用户的购物车数据
        QueryWrapper<ShoppingCart> shoppingCartQueryWrapper = new QueryWrapper<>();
        shoppingCartQueryWrapper.eq("user_id", userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(shoppingCartQueryWrapper);

        if (shoppingCarts == null) {
            throw new CustomException("没有添加商品哦！");
        }
        //查询用户数据
        User user = userService.getById(userId);

        //查询地址数据
        QueryWrapper<AddressBook> addressBookQueryWrapper = new QueryWrapper<>();
        addressBookQueryWrapper.eq("id", orders.getAddressBookId());
        AddressBook addressBook = addressBookService.getOne(addressBookQueryWrapper);
        if (addressBook == null) {
            throw new CustomException("地址信息有误！");
        }

        //向订单表插入数据，一条数据
        long orderNumber = IdWorker.getId();//订单ID/订单号

        AtomicInteger amount = new AtomicInteger();
        List<OrderDetail> orderDetails = new ArrayList<>();
        orderDetails = shoppingCarts.stream().map(item -> {
            OrderDetail orderDetail = new OrderDetail();

            orderDetail.setOrderId(orderNumber);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());

            //金额累加
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());//订单总金额

            return orderDetail;

        }).collect(Collectors.toList());
        orders.setUserId(userId);


        orders.setNumber(String.valueOf(orderNumber));
        orders.setId(orderNumber);//设置订单id
        orders.setOrderTime(new Date());
        orders.setCheckoutTime(new Date());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        this.save(orders);
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        //清空购物车数据
        shoppingCartService.remove(shoppingCartQueryWrapper);
    }
}
